The Optical Illusions Thread

[blessmycottonsocks]

I've had a scroll through and haven't seen this one posted yet. The red circle appears to be recessed.

View attachment 55437

Works for me (until you close one eye).

 

[Floyd1]

WTFF?

https://twitter.com/i/web/status/1527351932943319040

Come on then @EnolaGaia - put us out of our misery.

 

[Mythopoeika]

Call me an optimist, but I also see no recession.

Not yet, give it time...

 

[blessmycottonsocks]

Come on then @EnolaGaia - put us out of our misery.

Click on the Twitter link - the explanation behind the clever construction of the object is given.

 

[Anonymous34905]

I've had a scroll through and haven't seen this one posted yet. The red circle appears to be recessed.

View attachment 55437

I don't see anything?

 

[Sollywos]

I don't see anything?

Same here! I couldn't decide if it was something wrong with my eyes or if I was just being thick ... but I haven't a clue what they are on about! lol

 

[EnolaGaia]

Come on then @EnolaGaia - put us out of our misery.

I got as far (on my own) as concluding the illusion of multiple shapes was a result of the thickness and contours of the grid's cells' "walls".

Then I found an explanation that confirmed the direction I was headed.

Look at the initial static image and notice how the grid is casting shadows underneath its structure - insinuating the structure can't be sitting flat on the table-top. Also note that in this initial image some of the circular cells show slight 'corners' (not-quite-circular points) around their peripheries.

The grid's cells are differently shaped from one side to the other, and whether you see pure circular versus more linear cell shapes depends on both (a) which side you're seeing and (b) the exact angle at which you're seeing the grid.

The illusion is a combination of different shapes on different sides and a bit of forced perspective to accentuate the different impressions each side can give.

 

[Floyd1]

I got as far (on my own) as concluding the illusion of multiple shapes was a result of the thickness and contours of the grid's cells' "walls".

Then I found an explanation that confirmed the direction I was headed.

Look at the initial static image and notice how the grid is casting shadows underneath its structure - insinuating the structure can't be sitting flat on the table-top. Also note that in this initial image some of the circular cells show slight 'corners' (not-quite-circular points) around their peripheries.

The grid's cells are differently shaped from one side to the other, and whether you see pure circular versus more linear cell shapes depends on both (a) which side you're seeing and (b) the exact angle at which you're seeing the grid.

The illusion is a combination of different shapes on different sides and a bit of forced perspective to accentuate the different impressions each side can give.

Brilliant. Cheers.

 

[EnolaGaia]

This short YouTube video illustrates how it works and how you can make an ambiguous cylinder to play with ...

 

[brownmane]

Not yet, give it time...

 

[brownmane]

I got as far (on my own) as concluding the illusion of multiple shapes was a result of the thickness and contours of the grid's cells' "walls".

Then I found an explanation that confirmed the direction I was headed.

Look at the initial static image and notice how the grid is casting shadows underneath its structure - insinuating the structure can't be sitting flat on the table-top. Also note that in this initial image some of the circular cells show slight 'corners' (not-quite-circular points) around their peripheries.

The grid's cells are differently shaped from one side to the other, and whether you see pure circular versus more linear cell shapes depends on both (a) which side you're seeing and (b) the exact angle at which you're seeing the grid.

The illusion is a combination of different shapes on different sides and a bit of forced perspective to accentuate the different impressions each side can give.

That was the thought that I had, but didn't really have any idea of how to actually find the explanation. Thanks @EnolaGaia for doing all the research for those of us lazy people.

 

[TangletwigsDeux]

Growing black hole illusion (found on Reddit)

EDIT "supposedly it works for 80% of people or so"

 

[GerdaWordyer]

 

[chrissho]

View attachment 55885

Clever illusion

 

[Floyd1]

View attachment 55757

Growing black hole illusion (found on Reddit)

EDIT "supposedly it works for 80% of people or so"

For me, the black hole gets larger when I move my eyes from top to bottom or vice versa.

 

[Ronnie Jersey]

For me, the black hole gets larger when I move my eyes from top to bottom or vice versa.

Me too, is that the way it's supposed to work?

 

[brownmane]

For me, the black hole gets larger when I move my eyes from top to bottom or vice versa.

I only have to stare at it for a short while.

 

[Lord Lucan]

My wife once caught me masturbating to an optical illusion.​

I told her “It’s not what it looks like”.

 

[Swifty]

Peripheral Curved Line Illusion

https://michaelbach.de/ot/geom-periphCurving/

 

[Swifty]

(It changes every 5 seconds for me ..)

 

[michael59]

It takes me a while to 'lock in' on those images. I find that moving my head side-to-side a bit helps to find the 3D part of the image.

I have never been able to see anything in this form of optical illusion.

 

[Fluttermoth]

(It changes every 5 seconds for me ..)

View attachment 56420

It appears to be completely random to me; I was timing it and it varied between three and twenty seconds Good illusion though

 

[Lord Lucan]

(It changes every 5 seconds for me ..)

View attachment 56420

Damn. Every 5 for me too. That's very cool.

 

[Swifty]

Damn. Every 5 for me too. That's very cool.

It's twisting my melon man.

 

[Sollywos]

I can make it change at will from my expeience of making patchwork quilts where these sort of optical illusions are a common design ploy.

 

[pandacracker]

I can make it change at will from my expeience of making patchwork quilts where these sort of optical illusions are a common design ploy.

You've found your superpower!

 

[Nemo]

I can both at the same time.

 

[Cochise]

(It changes every 5 seconds for me ..)

View attachment 56420

That is cool. A lot of illusions don't work on me. But that does - it's not a regular 10 seconds, but it does keep changing from one to the other and I've not yet been able to change it deliberately.

 

[TangletwigsDeux]

When this clicked it made my eyes go squiffy:

https://www.reddit.com/r/woahdude/comments/vm1ff8

 

[Ascalon]

Here's another...

https://twitter.com/i/web/status/1543335895700750336